PHP URL Parameter Processing
	Some test URLs
	
		- year=2018
 
		- year parameter defined but without value - no error but the value is empty
 
		- without year parameter- this will generate an error
 
	
	The year parameter from the URL is not set.
Notice:  Undefined index: year in C:\home\site\wwwroot\examples\php-input\url-get.php on line 23
The year parameter from the URL is empty.
Notice:  Undefined index: year in C:\home\site\wwwroot\examples\php-input\url-get.php on line 27
The year parameter from the URL: